JP2008004483A - Operation monitoring device of disconnector, disconnector, and operation monitoring method of disconnector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operation monitoring device of a disconnector capable of detecting trouble, and of identifying a part where the trouble occurs even when the trouble occurs in a part of the disconnector. <P>SOLUTION: This operation monitoring device 1 of a disconnector has a blade changing over an on-state of a power transmission path to an off-state thereof and vice versa, an operation device driven in response to on- or off-operation command, and a rotary shaft 150 transmitting rotational drive of the operation device to the blade. The operation monitoring device is provided with: a measurement part 11 measuring time series variation of the angular velocity of the rotary shaft 150 transmitting the rotation of the operation device of the disconnector to the blade; and a determination part 10 comparing the measured time series variation of the angular velocity with reference time series variation of the angular velocity of the rotary shaft used as a reference to determine presence of trouble of the disconnector based on the difference between the measured temporal variation of the angular velocity and reference temporal variation of the angular velocity. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus and a method for monitoring the operation of a disconnect switch that is one of power switches provided in a power generation substation or the like.

  There are various types of substation equipment at the substation, such as circuit breakers, disconnectors, and transformers. In performing maintenance and inspection of such substation equipment, it is necessary to grasp the operating state of each apparatus, and conventionally, inspection inspection of equipment has been performed. However, it is not always easy to accurately grasp the operating state of a device during operation only by inspection. In particular, circuit breakers and disconnectors, which are power switches, gradually increase the operating time of each part due to grease sticking, etc., eventually leading to failure, but the inspection time accurately determines the operating time of each part. It is difficult to detect the malfunction of the switch at the initial stage because it cannot be done.

As a widely used method for monitoring the operation of disconnectors, whether or not there is a fault by managing the operating time of the disconnector from the input of the command to operate the disconnector until the limit switch of the operating mechanism is restored Is used. In relation to this, Patent Document 1 describes a method of monitoring the operation status of the disconnector based on the time difference between the control current input to the disconnector and the operation current.
JP-A-11-273510

  By the way, the operation of the mechanism in the disconnector is performed by sequentially operating the mechanisms having different operation speeds. In the above-described method, the presence or absence of an abnormality is monitored based on the operation time of the entire disconnector. Therefore, even if an abnormality occurs in a part of the disconnector mechanism, the operation time greatly changes until the abnormality proceeds greatly. The abnormality cannot be detected. Further, even when an abnormality is detected, the part where the abnormality has occurred cannot be specified. Further, the method described in Patent Document 1 also has a problem that, for the same reason, even when an abnormality is detected, the portion where the abnormality has occurred cannot be specified.

  The present invention has been made in view of the above problems, and an object of the present invention is to detect an abnormality even when an abnormality has occurred in a part of a disconnector, and to identify a site where the abnormality has occurred. An object of the present invention is to provide an operation monitoring method for a disconnector.

  The operation monitoring device of the present invention transmits a blade that switches between an on state and a off state of a power transmission path, an operation device that is driven in accordance with an on / off operation command, and the rotational drive of the operation device to the blade. And an angular velocity measuring means for measuring a change in angular velocity of the rotary shaft that transmits the rotation of the operating device of the disconnector to the blade, and a time of the measured angular velocity. And determining means for determining whether or not the disconnector is abnormal based on a tendency of a difference between the change and a temporal change in the angular velocity of the rotating shaft as a reference.

  Here, the angular velocity measuring means may include a vibration type or rotary type gyroscope attached to the rotary shaft. The angular velocity measuring means is provided with a black and white pattern or slit on at least one of a side surface, an upper surface, and a lower surface, and a disk attached to the drive shaft and a black and white pattern or slit of the disk are provided. A light emitting diode for irradiating light on the surface, a light receiving element for receiving the light irradiated from the light emitting diode and reflected by the surface provided with the black and white pattern or slit of the disk, and output from the light receiving element Means for obtaining an angular velocity of rotation of the rotary shaft based on the received signal.

  Further, the determination means includes a means for identifying an abnormal location based on a location where the temporal change in the measured angular velocity is lower than the temporal change in the angular velocity of the reference rotating shaft, and the measurement angular velocity And means for identifying an abnormal location based on a location where the temporal change is higher than the temporal change in the angular velocity of the reference rotating shaft. Moreover, this invention shall include the disconnector characterized by incorporating the operation monitoring apparatus of a disconnector.

  According to the operation monitoring device of the disconnector of the present invention, the time change of the angular velocity of the rotating shaft that transmits the rotational drive to the blade of the disconnector is measured and compared with the time change of the angular velocity in a state where there is no abnormality. Therefore, even when an abnormality occurs in a part of the operating mechanism of the disconnector, the abnormality can be detected at an early stage. Further, the site where the abnormality has occurred can be identified based on the position and tendency of the difference between the measured temporal change in the angular velocity of the rotating shaft and the temporal change in the angular velocity without any abnormality.

  The present invention also provides a blade that switches between an on state and a off state of a power transmission path, an operating device that is driven in response to an on / off operation command, and a rotating shaft that transmits the rotational drive of the operating device to the blade. And a method for monitoring the operation of the disconnector, the angular velocity measuring step for measuring the time change of the angular velocity of the rotating shaft that transmits the rotation of the operating device of the disconnector to the blade, and the time change of the measured angular velocity. And a step of determining whether or not the disconnector is abnormal based on a tendency of a difference from the time change of the angular velocity of the reference rotating shaft.

  According to the present invention, even when an abnormality occurs in a part of the operating mechanism of the disconnector, the abnormality can be detected at an early stage, and the part where the abnormality has occurred can be identified.

Hereinafter, an operation monitoring apparatus according to an embodiment of the present invention will be described with reference to the drawings.
First, the disconnector to which the operation monitoring apparatus of the present embodiment is applied will be described.
FIG. 1 is a perspective view showing a disconnector provided with a lockout device to be monitored by the operation monitoring device of the present embodiment. As shown in the figure, the disconnector 100 includes a plurality of sets (three sets in the figure) of fixed contact portions 110a and 110b connected to the power transmission path, and a blade 120 that opens and closes between the fixed contact portions 110a and 110b. An insulator 130 for insulating the fixed contact portions 110a and 110b, an operation rod 150 for transmitting the rotation of an operation motor (not shown in FIG. 1) provided in the operation device 140 to one blade 120, An interlocking rod 160 for transmitting the rotation of the one blade 120 to the other blade 120 is configured. In the disconnector 100, the operation motor is rotationally driven based on an on / off operation command, the rotational drive is transmitted through the operation rod 150, and the blade 120 rotates, so that the fixed contact portions 110a and 110b are connected. Is switched to open / close the power transmission path.

  Here, the operating speed of each operation mechanism of the disconnector when the disconnector 100 is turned on or off has the following characteristics. First, when the operating load of a part of the disconnector 100 operating mechanism increases, the operating speed of that part decreases. In addition, if there is a solid astringency part in the operation mechanism, the operation speed immediately after passing through the solid astringency part increases primarily due to the reaction. Further, if there is play in a part of the operating mechanism, there is a large speed increase in a short time in the part that has entered the play, and a large speed decrease immediately after that. In addition, when a part of the operating mechanism is caught, the situation becomes almost astringent, but there is a large speed reduction at the catching part.

Furthermore, when the inventors examined the relationship between each part of the disconnector 100 and the operation speed and the speed change, it differs depending on the operation method (electric operation type, air operation type, etc.), voltage class, type of disconnector, The following relationship was obtained.
FIG. 2 is a graph showing an example of a time change of a standard angular velocity when the disconnector 100 is turned on. Based on the tendency of the angular velocity at the time of entering operation shown in FIG. 2 to change with time, the inventors have a portion where the angular velocity increases (hereinafter, referred to as a first section during the entering operation) and a portion where the angular velocity is substantially constant (hereinafter, referred to as the following). , Referred to as the second section during the input operation), a portion that increases after the angular velocity decreases (hereinafter referred to as the third section during the input operation), and a portion that becomes zero in a short time after the angular velocity has greatly increased ( Hereinafter, it was classified into a fourth section at the time of the on-operation, and the relationship between each section and the drive mechanism of the disconnector was examined. Then, the first section at the time of the on-operation is easily affected by the crank fulcrum portion of the power transmission unit, the second section is easily influenced by the blade rotating part, and the third section is easily influenced by the blade twisting part. The fourth section was found to be easily influenced by the crank fulcrum portion of the power transmission portion.

  Similarly, the following relationship was obtained for the cutting operation. FIG. 3 is a graph showing an example of a time change of a standard angular velocity change during the disconnecting operation of the disconnector. As shown in the figure, based on the tendency of the angular velocity at the time of the cutting operation to change over time, the inventors have increased the angular velocity (hereinafter referred to as the first section at the time of the cutting operation), and after the angular velocity has decreased, A rising part (hereinafter referred to as the second section during the cutting operation), a part where the speed angle is substantially constant (hereinafter referred to as the third section during the cutting operation), and zero in a short time after the angular velocity has greatly increased. (Hereinafter referred to as the fourth section at the time of cutting operation), and the relationship between each part and the drive mechanism of the disconnector was examined. Then, the 1st section at the time of cutting operation is easy to be influenced by the crank fulcrum part of a power transmission part, the 2nd section is easy to be influenced by a blade twisting part, and the 3rd section is easy to be influenced by a blade rotating part. The fourth section was found to be easily influenced by the crank fulcrum portion of the power transmission portion.

  The operation monitoring device 1 of the disconnector 100 according to the present embodiment detects an abnormality based on the knowledge about the influence of each part of the disconnector 100 described above on the angular velocity of the rotation of the rotary shaft 150. It is characterized by measuring the time change of the angular velocity of the rotating shaft 150 at the time of turning on or turning off 100 and comparing the time change of the angular velocity of the rotating shaft 150 when there is no abnormality to determine the presence or absence of abnormality. To do.

FIG. 4 is a diagram illustrating a configuration of the operation monitoring apparatus 1 according to the present embodiment.
As shown in the figure, the motion management device 1 of the present embodiment includes a measuring device 11 for measuring the temporal change in angular velocity of the rotating shaft 150, and an abnormality based on the temporal change in angular velocity measured by the measuring device 11. And a determiner 10 for determining the presence or absence.

  The measurement unit 11 includes a CPU 2, a memory 3, a recording unit 4, and a gyroscope 5 attached to the rotary shaft 150. As the gyroscope 5, a mechanical or vibration gyroscope can be used. When the gyroscope 5 measures the angular velocity of the rotary shaft 150, the gyroscope 5 transmits a signal corresponding to the angular velocity to the CPU 2, and the CPU 2 records the angular velocity corresponding to the input signal in the memory 3.

The determination unit 10 includes a CPU 6, a memory 7, and a recording unit 8. The determination unit 10 includes an appropriate external I / F, and can read the temporal change in angular velocity recorded in the memory 3 of the measurement unit 11 via the external I / F. The recording unit 8 records in advance a temporal change in angular velocity (hereinafter referred to as a reference angular velocity temporal change) measured in a state where there is no abnormality.
In addition, in this embodiment, although the determination part 10 and the measurement part 11 are described as another apparatus, you may integrate these. In that case, the CPUs 2 and 6 and the memories 3 and 7 can be shared. Moreover, the determination part 10 and the measurement part 11 are integrated with the disconnector 100, and it is good also as a disconnector with a self-diagnosis function.

First, with reference to the flowchart shown in FIG. 5, the flow of processing executed by the CPU 2 of the measurement unit 11 to measure the temporal change in the angular velocity of the rotating shaft 150 will be described. In the following description, CO is a counter timer indicating a recording time.
First, in step 400, when the gyroscope 5 does not detect the rotation of the rotating shaft 150 (that is, the angular velocity is zero), it waits until the rotation is detected. If the gyroscope 5 detects the rotation of the rotary shaft 150 in step 400, the memory 3 for recording the angular velocity is initialized in step 402.

In step 404, the angular velocity value detected by the gyroscope 5 is recorded in the memory 3.
Next, in step 406, the address of the memory 3 for recording the angular velocity is advanced.
Next, in step 408, the measurement unit time is added to the counter timer (CO).
Next, in step 410, when the angular velocity is detected, it returns to step 404 and repeats steps 404-410.

  If the angular velocity is no longer detected in step 410, the operation of the disconnector 100 is completed. Therefore, in step 412, the time change of the angular velocity recorded in the memory 3 is transmitted to the determination unit 10. .

  When the determination unit 10 receives the change in angular velocity with time from the measurement unit 11, the determination unit 10 reads the reference angular velocity change with time recorded in the recording unit 4. Then, the time change of the angular velocity received from the measurement unit 11 is compared with the change of the reference angular velocity time, and the presence / absence of abnormality is determined in the case of the on operation and the case of the turning operation as described in detail below.

First, the flow of the determination process in the case of the on operation will be described. FIG. 6 is a flowchart showing a flow of processing executed by the CPU 6 of the determination unit 10 to determine whether or not there is an abnormality when the disconnector in the determination unit 10 performs an on-operation.
First, in step 500, the time change of the measured angular velocity is compared with the reference angular velocity time change. If it is determined in step 500 that the measured temporal change in angular velocity and the reference angular velocity change in time are substantially the same, it is determined in step 502 that there is no abnormality. If it is determined in step 500 that there is a difference between the time change in the measured angular velocity and the reference angular velocity time change, in step 510, there is a period in which the angular velocity is lower than the reference angular velocity. Determine.

If it is determined in step 510 that there is a period during which the angular velocity is lower than the reference angular velocity, then in step 512, an abnormal location is identified based on the period during which the angular velocity is lower than the reference angular velocity. Do.
FIG. 7 is a flowchart showing in detail the flow of processing for identifying an abnormal location based on a period in which the angular velocity is lower than the reference angular velocity in step 512.
First, in step 600, it is determined whether or not the angular velocity has decreased as a whole compared to the reference angular velocity. If it is determined in step 600 that the angular velocity is generally lower than the reference angular velocity, as indicated by a broken line in FIG. 8, in step 602, the operation motor that is a mechanism for driving the disconnector is selected. Since it is highly possible that the angular velocity has decreased overall due to the decrease in rotation, it is determined that grease solidification or the like has occurred in a bearing such as a rotary insulator of the operating device. If it is determined in step 600 that the angular velocity has not decreased as a whole, a period in which the measured angular velocity is lower than the reference angular velocity is specified in step 610.

  In step 610, as shown by a broken line in FIG. 9, when a decrease in angular velocity is observed up to the intermediate portion, in step 612, the mechanism that affects the first section or the second section at the time of the above-described on-motion operation. It is determined that there is a possibility that a certain power transmission unit is twisted or a link mechanism is defective. Further, in step 610, as shown by a broken line in FIG. 10, when a decrease in angular velocity is observed in the second half, in step 614, the blade that is a mechanism that affects the third section at the time of the on-movement described above. It is determined that there is a possibility of twisting, rusting or poor adjustment of the twisted part. In step 610, as shown by a broken line in FIG. 11, when a decrease in angular velocity is observed in the final part of the operation, in step 616, the power that is a mechanism that affects the fourth section at the time of the on-operation described above. It is determined that there is a possibility of poor adjustment of the crank fulcrum part of the transmission part.

  As described above, in Steps 600 to 616, after making a determination based on the period in which the angular velocity has decreased, it is determined in Step 620 whether there is an increase in speed immediately after the period in which the angular velocity has decreased. If an increase in speed is observed immediately after the period in which the angular velocity has decreased in step 620, it is determined in step 622 that there is a possibility that a mechanism that affects the period in which the angular velocity has decreased may be caught.

If it is determined in step 510 of FIG. 6 that there is no period in which the angular velocity has decreased compared to the reference angular velocity, in step 520, the measured angular velocity changes with time compared to the reference angular velocity with time. Determine if there is a period during which is rising.
In step 520, when a period in which the measured angular velocity is increased compared to the reference angular velocity is found, next, in step 522, the abnormal part of the disconnector is identified based on the period in which the angular velocity is increasing. Do.

FIG. 12 is a flowchart showing in detail the flow of processing for identifying an abnormal location based on a period in which the angular velocity is higher than the reference angular velocity in step 522.
First, in step 700, as indicated by a broken line in FIG. 13, in the case where the angular velocity is higher than the reference angular velocity as a whole, in step 702, in the pneumatically operated disconnector, a portion related to the exhaust pressure is used. It is determined that there is a defect. In Step 700, when the increase of the angular velocity is not seen as a whole, in Step 710, the period during which the angular velocity is increasing is specified.

  In step 710, when the angular velocity is higher than the reference angular velocity in the first half as shown by the broken line in FIG. 14, in step 712, the above-described first interval or second interval at the time of the on-movement is affected. It is determined that there is a possibility of poor adjustment of the crank fulcrum portion of the power transmission portion that is a mechanism that provides the power. Further, in step 710, when the angular velocity is higher than the reference angular velocity in the latter half as shown by the broken line in FIG. 15, in step 714, the above-described third section at the time of the entering operation is affected. Since the spring of the contact portion in the blade twisting portion, which is a mechanism, has deteriorated, it is determined that there is a possibility that the spring force is reduced.

Returning to FIG. 6, as described above, in steps 510 to 522, a determination is made based on whether or not the angular velocity has decreased or increased, and the period thereof, and then in step 530, the measured angular velocity changes over time to the reference angular velocity. It is determined whether there is an ascent and descent (hereinafter referred to as abnormal increase / decrease) that is not included in the time change.
As a result, when an abnormal increase / decrease is observed in the temporal change of the angular velocity as shown by a broken line in FIG. 16, in step 534, there is a possibility that the mechanism that affects the period in which the abnormal increase / decrease occurred has a problem. Determine and exit. If no abnormal increase / decrease is found in the temporal change in angular velocity in step 530, the determination is terminated.
As described above, the time change of the angular velocity measured by the determination unit and the time change of the reference angular velocity are compared to determine the presence / absence of an abnormality and its location.

Next, the flow of determination processing during the cutting operation will be described.
The determination process at the time of the turning operation is substantially the same as the determination process at the time of the on-operation shown in FIG. 6, but the abnormal location is identified based on the period in which the angular velocity is lower than the reference angular velocity in step 512. Processing to be performed is different.
FIG. 17 is a flowchart showing a process for identifying an abnormal location based on a period during which the angular velocity is lower than the reference angular velocity during the cutting operation.
First, in step 800, it is determined whether or not the angular velocity has decreased as a whole compared to the reference angular velocity. If it is determined in step 800 that the angular velocity has decreased as a whole as indicated by a broken line in FIG. 18, in step 802, the rotation of the operation motor, which is a mechanism for driving the disconnector, has decreased. Since it is highly likely that the angular velocity has decreased as a whole, it is determined that grease solidification or the like has occurred in a bearing such as a rotary lever of the operating device. If it is determined in step 800 that the angular velocity has not decreased as a whole, in step 810, a period during which the measured angular velocity is lower than the reference angular velocity is specified.

  In step 810, as shown by a broken line in FIG. 19, when a decrease in angular velocity is observed in the first half, in step 814, the blade twist, which is a mechanism that affects the first section and the second section during the cutting operation. Judge that there is a possibility of twisting, rusting, or misadjustment of the turning part. Further, in step 810, as shown by a broken line in FIG. 20, when a decrease in angular velocity is observed in the operation final part that is a mechanism affecting the fourth section during the turning operation, in step 812, the power transmission unit It is determined that there is a possibility of poor adjustment of the crank fulcrum part.

As described above, in Steps 800 to 814, after making a determination based on the location where the angular velocity decreases, it is determined in Step 820 whether there is a speed increase immediately after the angular velocity decreases. If an increase is observed immediately after the decrease in angular velocity in step 820, it is determined in step 822 that there is a possibility that a mechanism affecting the period during which the angular velocity decreases may be caught.
When the determination is made based on the time change of the measured angular velocity at the time of the cutting operation, FIG. 6 is used except for the step of identifying the abnormal part in the disconnector based on the period in which the angular velocity is decreased in the above-described step 512. By performing the same processing as the determination processing at the time of the on-operation described with reference, it is possible to determine the presence / absence of an abnormal location and the location.

  As described above, according to the disconnector operation monitoring device of the present embodiment, the temporal change of the angular velocity of the rotating shaft that transmits the rotational drive to the blade of the disconnector is measured, and the temporal change of the angular velocity in a state where there is no abnormality. In order to determine the presence or absence of an abnormality by comparing with, an abnormality can be detected early even when an abnormality occurs in a part of the operating mechanism of the disconnector. Furthermore, a site where an abnormality has occurred can be identified based on the position and tendency of the difference from the temporal change in angular velocity in a state where there is no abnormality.

  In the above-described embodiment, the gyroscope is used as a device for measuring the angular velocity of the rotary shaft 150. However, the present invention is not limited to this, and a detachable disk 22 as shown in FIG. A device 23 that irradiates light to the disk 22 by the light emitting diode 20 and receives reflected light from the disk 22 by the light receiving element 21 and detects the angular velocity based on this can be used. Further, a rotary encoder or the like can also be used. In short, any device that can detect the angular velocity may be used.

It is a perspective view which shows the disconnector provided with the lockout apparatus used as the object of the monitoring of the operation | movement by the operation | movement monitoring apparatus of this embodiment. It is a graph which shows an example of the time change of the standard angular velocity at the time of turning-on operation of a disconnector. It is a graph which shows an example of the time change of the standard angular velocity at the time of cutting operation of a disconnector. It is a figure which shows the structure of the operation | movement monitoring apparatus of this embodiment. It is a flowchart which shows the flow of the process which measures the angular velocity by a measuring device. It is a flowchart which shows the flow of the process which determines the presence or absence of abnormality when the disconnecting switch in a determination part carries out an entry operation. It is a flowchart which shows in detail the process which specifies an abnormal location based on the position where the speed is falling. It is a graph which shows an example of the time change of angular velocity when the fall of speed is seen as a whole at the time of on-operation. It is a graph which shows an example of the time change of angular velocity when the fall of speed is seen in the first half part at the time of on-operation. It is a graph which shows an example of the time change of angular velocity when the fall of speed is seen in the latter half part at the time of an input operation. It is a graph which shows an example of the time change of angular velocity when the fall of speed is seen in the operation | movement last part at the time of on-operation. It is a flowchart which shows in detail the process which specifies an abnormal location based on the position where the speed is increasing. It is a graph which shows an example of the time change of angular velocity when the speed increase is seen as a whole at the time of the on-operation. It is a graph which shows an example of the time change of angular velocity when a speed increase is seen in the first half part at the time of on-operation. It is a graph which shows an example of the time change of angular velocity when a speed increase is seen in the latter half part at the time of on-operation. It is a graph which shows an example of the time change of angular velocity when the new raise and fall at the time of on-operation are seen. It is a flowchart which shows the process which specifies an abnormal location based on the position of the speed fall at the time of cutting operation. It is a graph which shows an example of the time change of angular velocity when the fall of angular velocity is seen as a whole at the time of cutting operation. It is a graph which shows an example of the time change of angular velocity when the fall of angular velocity is seen in the first half part at the time of cutting operation. It is a graph which shows an example of the time change of angular velocity when the fall of angular velocity is seen in the operation | movement last part at the time of cutting operation. It is a figure which shows the apparatus for detecting angular velocity.

Explanation of symbols

1 Operation monitoring device 2 CPU
DESCRIPTION OF SYMBOLS 3 Memory 4 Recording part 6 CPU 7 Memory 8 Recording part 10 Judgment part 11 Measuring part 100 Disconnector 120 Blade 130 Insulator 140 Operation device 150 Rotating shaft

Claims (6)

A disconnector having a blade that switches between an on state and a off state of a power transmission path, an operation device that is driven according to an on / off operation command, and a rotary shaft that transmits the rotational drive of the operation device to the blade The operation monitoring device of
Angular velocity measuring means for measuring the temporal change of the angular velocity of the rotating shaft that transmits the rotation of the operating device of the disconnector to the blade;
The operation of the disconnector comprising: a determination unit that determines whether or not the disconnector has an abnormality based on a tendency of a difference between the measured change in the angular velocity with respect to the temporal change in the angular velocity of the reference rotating shaft. Monitoring device. The angular velocity measuring means includes
2. The disconnection switch malfunction monitoring apparatus according to claim 1, further comprising a vibration type or rotary type gyroscope attached to the rotary shaft. The angular velocity measuring means includes
A disk provided with a black and white pattern or slit on at least one of a side surface, an upper surface, and a lower surface, and attached to the drive shaft;
A light-emitting diode that irradiates light toward the surface of the disk provided with a black and white pattern or slit;
A light receiving element for receiving light irradiated from the light emitting diode and reflected by a surface provided with a black and white pattern or slit of the disk;
The operation abnormality monitoring apparatus according to claim 1, further comprising: a unit that obtains an angular velocity of rotation of the rotary shaft based on a signal output from the light receiving element. The determination means includes
Means for identifying the location of the abnormality based on the location where the time change of the measured angular velocity is lower than the time change of the angular velocity of the reference rotating shaft;
A means for identifying an abnormal location based on a location where the temporal change of the measured angular velocity is higher than the temporal change of the angular velocity of the reference rotating shaft is provided. The operation abnormality monitoring device described.   A disconnector comprising the disconnector operation monitoring device according to any one of claims 1 to 4. A disconnector having a blade that switches between an on state and a off state of a power transmission path, an operation device that is driven according to an on / off operation command, and a rotary shaft that transmits the rotational drive of the operation device to the blade The operation monitoring method of
An angular velocity measuring step for measuring a temporal change in angular velocity of the rotating shaft that transmits the rotation of the operating device of the disconnector to the blade;
The operation monitoring of the disconnector comprising the step of determining the presence or absence of an abnormality of the disconnector based on a tendency of a difference between the measured change of the angular velocity and the temporal change of the angular velocity of the reference rotating shaft. Method.

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